Shock-absorber.



P. TODD., sHocKsonER. 1, APPLlCATION FILED JULY Il. 1917.

1,292,539, 'Patented Jan. 28, 19m

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TTORNEYS sHocK AsoRaER.; APPLICATION FILED JULY Ih |911.

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Patented J nn. 28, 1919.

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BERCY TODD, OF GADSDEN, ALABAM.

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Specication of ILetters Patent. Patntd J an. 28, 1919.

Application filed July 11, 1917. Serial No. 179,819.

proveinentsin Shock-Absorbers, of whichI the following is a, specification.

My invention is an improvement in shock absorbers, and has for its object to provide mechanism of the` character specified, capablo of application to `motor vehicles of every character, for cushioning the upward movement of thevehicle with respect to the body and for cushioning the recoil.

In the drawings:

Figure 1 'is a longitudinal section through one embodiment of the invention;

Fig. 2 is a section at right angles to Fig. 1;

Figs. 3 and 4 are ections on the lines 2%3 and lf-4, respective y, of F ig. 2;

Fig. 5 is a partial side view showing the manner of attaching" the absorber to ears having semi-elliptical springs;

Fig. 6 is a sectional view of a modified form; Y

Fig. 7 is a side view of the same, with parts in section; y y

Fig. 8 is a longitudinal section of another embodiment of Athe invention, showing the manner of attachment to a Ford car;

Fig. 9 is a section on the line 9-9 vof Fi 8;

Fig. l is a view similar to Fig. 5, showing the manner of attaching the absorber to cars having platform springs;

Fig. 11 is a. side view of thev wedge shaped plunger and its attachments;

Fig. 1.2 is a sectional view showing a. modified forni of'brake device. y

ln. the embodiment of the invention shown in Figs. 1 to 4, inclusive, two similar cylinders lare provided, the ends of the cylinders being closed by common heads 2, and 3 which are connected together and held on the cylinders by means ot' a screw bolt 4 which is passed through the heads between the cylinders. I

A plunger rod is mounted in each cylinder to move through the head 2, and each plunger rod i's provided at its lower end with a wedge shaped-i plunger 6 and with a inarginal rib 7 above `the plunger. Each plunger moves between the sections 8 of an expander, thesaid sections being similar, as

5 shown.

A brake ring-9.9i suitable material encirsprings.

cles the sections of each expander, being held in grooves 1n the sections, as shown, and the expander sections are reamed at their tops and bottoms, the ribs 7 seating in the upper reamed portions. A coil spring 10 isar ranged in` the cylinder between the rib 7 and the head 2, the said spring actingnorl mally to force the plunger downwardly, and

a second, lighter spring 11 is arranged in each cylinder below the plunger, the said spring at its upper end engaging Within Athe roamed portions of the expander sections.,4 ,i It will be noticed that each wedge is provided with a stop'12 in the form of a washer held at the bottom of the saine by a screw, the washer extending beyond the opening between the sections and engaging the seetions when the plunger is moved upwardly to move the sections with the plunger. The rib 7 acts as a stop above'the expander sections. The tension of the spring 11 may be varied by means or' a set screw 13 which is threaded through the head 3 at the spring, and the lower end of the spring rests upon a dish ll with which the screw cooperates.

The head 2 has an upward guide extension 15 at each, plunger, and the upper end of euch plunger stem moves in the adjacent guide. A bolt 16 is passed transversely of themxtensions just above the head, andthe said bolt passes through longitudinally ex'- tending` slots 17n in the plunger stems.i. A second bolt 17 is connected with the upper ends of lthe stems, and the parts may be lubricated by means of ends of the bolts. l 1 ln Fig. 5 is shown the manner of attaching the device to a rar having semi-elliptical In this instance the bolt 17 is passed through the eye at the end ot' the spring 19, and the bolt 1G is passed through an eye in the frame or spring supporting braeketvQO. f y;

lf desired, four cylinders may be used., as shown` in Figs. 6 and 7. In this construction each pair of' cylinders 2l 'isfcledzat `its top by a head and at lower end each cylinder is closed by a threaded plug 23. The plimgcr and expanders are similar to the construction of Fig. 1, and springs 2G and 27 are similar to the springs 1() and 1l and operate in the saine manner.

Thelset screws 28 which regulate the tension of the springs 27 are threaded through the plugs Z3 and engage disks 29 on which grease cups 18 on the the lower ends of the springs seat. A case 3Q is provided for inclosing each pair of i ,cylinders, each case being substantially cup n The upper ends of the plungers of each. pair of cylinders are connected by a yoke a, and a bolt 29a corresponding tothe bolt l .ger and the head 32, While a light yspring 40 gdiisk 42, which is engaged by a set screw 43l jto vary the tension of the spring. This set ,screw isthreaded through a threaded plug shapedand engaging at its top outside the dependmg flange of the head 22.

'its bottom by a. head 32 vhaving an arm 33 lfor connection with a frame 34. A plunger which corresponds to the Aplunger 24 of Fig. 6 is reversely arranged, however, the stem 36 of the plunger extending through .the head 32 and the end of the stem is connected by hangers 37 with the spring 38. A heavy spring 39, corresponding to the spring 10`of Fig. 1, is arranged between the plunisfarranged between the expander 41 and a y 44 which closes the upper end of the Acylinder, and a cap 45 is placed over the setl screw.

In Fig. 10 is shown the mannerof connecting the device to a vehicle having platform springs. In this arrangement the bolt 16 is connected to the spring 46 and a bearing 4'? is arranged on the bolt 48. A b'clt 49 passes through the bearing, 'and a hanger 50 is connected to the bolt 49.

In the embodiment of the invention shown in Fig. 12 the cylinder 51 has p arranged therein the sectional expander 52, and the expander-sections are adapted to be expand- A ed bythe Wedge These sections carry a brake ring 54 Which is provided with openl ings 55, in which may be packed graphite to lubricate the cylinder and the brake device.

I clan/nz' .1. A shock absorber comprising a series of cylinders, a Wedge shaped plunger in,each,-

cylinder, a sectional vexpanding block `with which each plunger coperates, each block being movable `with 'the plunger and having` a limited movementfwith 'respect tothe plunger, a spring normally forcing the plun ger in a direction to cause the plunger to expand the sections, a lighter spring pressing the expander in the opposite. direction to 'cause it to follow the. plunger when it cpmpresse's the first name'dl spring, a brake ring encircling the expander block, and

- spring.

means for tensioning the last namedspring,

the plungers being adapted to be connected with one element to be cushioned and the cylinders With the other.

2. A shock absorber comprisinga series of' cylinders, a Wedge shaped plunger in each ing the expander in the opposite direction to cause it to follow ,the plunger when it compresses the first named spring, a brake ring encircling the expander block, .and means for tensioning the last named spring.

3. A shock absorber comprising a series of cylinders, a Wedge lshaped plunger in each cylinder, a sectional expanding block with which each plunger cooperates, each block being movable with the plunger and having a limited movement With respect to the plunger, a spring normally forcing the plunger in a direction to cause the plunger to expand the sections, and a lighter spring pressing the expander in the opposite direction to cause it to followthe plunger when it compresses the first named spring.

4. A shock absorber comprising a cylinder, a Wedge shaped plun er therein, a sectional expander block withY which the plunger coperates, the said block having alimited motion with respect to the plunger, `a

spring normally forcing the plunger in direction to expand the sections, and means ouretarding the movement of the block with the plunger under the influence of the spring, said means being adjustable.

5. A shock absorber comprising a cylinder, a Wedge shaped plunger therein, a sectional expander block With which thepluny ger cooperates, the said block havinga limited motion With respect to thc plunger', a springvnormally forcing the plunger in' a direction to expand the sections, and means for retarding the movement 'of the block with the plunger under theinluencc of the 6. A shock absorbercomprising a cylinder, a Wedge shaped plunger therein, an

expander block with Whichthe plunger cooperates, the block having a limited motion yWith respect to the plunger, a spring normally forcing Ithe plunger in a direction to expand the block, and means for retarding Athemovernent of the block with the plunger `under the infiuence of the spring. l BERCY TODD.

Witnesses: Y j R. A. PoLoLozn, ERNEST SMITH. 

